地面粗糙度分市跃变对边界层影响的数值研究
投稿时间:1988-01-12  修订日期:1988-06-14  点此下载全文
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作者单位
胡非 中国科学院大气物理研究所 
中文摘要:本文在定常和中性层结条件下,利用有限元方法研究了下垫面粗糙度分布有阶跃变化的边界层问题。得到平均风场、气压变化以及湍流交换系数的主要分布特征,模拟出内边界层的发展规律。并将有关结果与观测事实作了比较。
 
A NUMERICAL STUDY ON THE INFLUENCE OF THE SUDDEN CHANGE IN SURFACE ROUGHNESS ON THE BOUNDARY LAYER
Abstract:A two-dimensional stationary model is used to examine the dynamiceffects produced by air flow over the surface which experiences a suddenchange in roughness. Results from the finite element numerical solutionshow that the mean velocity and turbulence structure are quite differentfrom those over homogeneous surface.
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